Stop motion



W. J. SCOTT STOP MOTION Nov. 28, 1933.

Filed Aug. 15, 1929 INVENTOR. B JJOO/ i A T TORNEYS.

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-s'roPMoTIoN I `Walter .I. Scott, Woonsocket, R. I. Application August15, 1929, Serial No;-386, 173' i toai sg (Cl.192`-;116.5)` V 'Anotherobject is to provide a stop motion having interengaging latch and catchmembers which disengage upon the making of an electric circu't and which'break/the electric circuit upon disengagement. H i i A further 'objectof the invention is to provide a movable catch 'member in an electriccircuit which is autorrlaticall's returned to locking position uponbreaking of* the circuit. Other objects and advantageous features willbe readily apparent from' the detailed description fo1lo`wing,'inconjunction with the accompanyirg drawing, and Will be particularlypointed out in the appended claims.

"In the drawing: h i Fig. 1 is a View of the power control and the istop mechanism therefor; i

Fig. 2 is an enlarged View partly in section showing the stop mechanismlocked in inoperative position; t c

Fig. 3 is aview similar to Fig. 2 showing the 'members in position forrelease of the stop mechanism; Fig. 4 is a perspective View of the catchmember andits associatedparts; and i I Fg. 5 is a view, partly insection, ,onthe line -5--5 of Fig. 2, showing the relative position 'ofthe catch and associated parts with respect to -the armature; 4

i It has'been found desirable to construct a stop,

mechanism for `textile machinerywhich is northe' cooperating latchmember are also included in the electric circuit so as to break the circuit upon operativemovement of the control mechi anism; the catchmember being automatically returned to its normal looking position uponsuch breaking of the circuit; and the following is a detaileddescription of one constructional form hanism' embod in the rinc` le oof Stop meg y g p g 42 and has. outwardly extending ends-14 and 45respectively Contacting with the base 40 and the 115 my invention.

er pulley of the usual type and 11 an idler pulley, mounted as shown ona common shaft 12.

*has a stop 15 adapted to be engaged by an op- 'Referring to thedrawing,lo'repres'ents 'a powerating lever 16 -for moving the belt shiftertostopthe machine. The Operating lever `16 is piV- oted at-17-,* preferably tothe frame of the machine, a spring 18 is fixedly secured to astationarymemb'er or the like, as at 19, engaging the Operating leverto`pull the lever in the direction to shiftthe belt shifter forstoppingthe machine. Secured to the Operating lever'lin' any suitable manner, isa bracket 20 extending laterally therefrom and having a bifurcated end21; alatch *member 22 'is pivotally mounted within said bifurcatedtendand has a stop 23 engaging the under side of the bracket 20, a spring 24Secured to within a fixed arm or the like 26, within asutable bore 27therein, and is separated from the sidesof the bore by insulati'on 28.-The casing is removably mounted within the bore, and is secured inposition by any suitable means. Within the 'casing 25 are' magnets 29,positioned as V shown in Fig; 5, having suitable windings grounded atone end to the casing and'secured to an insulated contact pin or thelike 30 at theother end, a lead wire 31 being fastened or Secured in theusual manner to the contact pin 30. i

Within the casing 27 is an armature plate 32 having a pin 33 extendingthrough spaced ends 34 at one' side, thereof, the pin 33 being pivotallymounted within' the sides of the casing 27 to permit swingingi of thearmature plate in a vertical plane. A spring 35, secured to the plate 32by riveting or in other-suitable manner, normally tends to disengage thearmature plate from` the armature core upon breaking of the electriccircuit. The side ofthe plate opposite the spaced ends 34 'has aplurality of notches 36 formed V therein' which normally function aslooking notches for two arms 37 which are pivotally mounted in the sidesof the casing by means of pins 38; extending therethrough.

A catch member ,39 is positioned in the lower, open end of the casing,and has a rearward extendingbase 40, the base" having two upwardlyextending spaced ears 41 through which extends a pivot pin 42,'*the endsof the pin 42 being mounted in the sides of the casing and about `which'pin the catch member 39 is swingingly' 11 mounted soas to be engaged bythe latch member 22. A coil spring 43 is mounted on the pin rear of.thelcasing' 27 tolnormally force thecatch member-39 downwardly intoengagement with the latch member 22`-The catch member 39' hastwotrunnions 46 extending laterally from the sides thereof, whichtrunnions bear on 'the The parts being in the position shown in Fig.

2, the switch 48 is closed, completing the electric circuit; thearmature cores now attract and lift the armature plate 32, releasing thearms 37, and permitting the pull of springls, through the Operatinglever and the latch member, to move the catch member and the arms, theupward' swinging of the catch member against the compression of spring43 releasing the latch member and permitting a lateral shifting of the.

belt shifter 13 to stop the machine. The separation of the catch andlatch members breaks the circuit, ,the armature plate 32 now swingingdownwardly under the action of spring 35- and of gravity, the spring 43forcing the catch member downwardly until the trunnions 46 enter intonotches 47, whereupon the arms 37 are swung back to their initiallooking position, the catch member and associated parts now appearing asshown in Fig. 2. To start the machine again the shift rod 14 is shiftedin the opposite direction, thusmoving Operating lever 16 against thetension of spring 18 until latch member 22 engages with catch member 39and turns against the tension of spring 24, the spring 24 swinging thelatch member into' looking engagement as soon as the latch member clearsthe catch member. The stop mechanism is therefore again releasably' heldin locked position.

The above description is directed to a specific embodiment of a stopmechanism constructed in accordance with the principles of my invention,but changes within the limits of the claims hereto appended andadaptations to other types of machines may obviously be made withoutdeparting from the nature and spirit of the invention. e

I claim: i

1. A stop mechanism comprising a power stop, a bodily movable Shiftmember ;for Operating said power stop, means normally urging said memberto operate the power stop, movable catch means releasably retaining.said member against shifting, an electric circuit, an electromagnet insaid circuit arranged to operate said catch means to release said Shiftmember upon closing of the circuit, said. Shift member being included insaid circuit and arrangecl to move and break the circuit when releasedby said catch means, and

means automatically returning said catch means to retaining positionwhen said circuit is broken and said electromagnet is deenergized.

2. A stop mechanism comprising a power stop, a movable member forOperating said power stop, yielding means normally urging said movablemember to operate the' power stop, a latch carried by said movablemember, a movable catch releasably engaging said latch to hold themovable member in inoperative position, an electric circuit includingthe latch, the catch and the movable member, and an electromagnet insaid circuit to operate when energized to move the catch to release-thelatch to permit said movable member to operate-the power stop andsimultaneously break the circuit to permit the catch to simultaneouslyreturn to normal.

3. A stop mechansm comprising a power stop, a movable member forOperating said power stop, yielding means normally urging said movablemember to Shift its position, a pivoted spring pressed latchcarried bysaid movable member,

a movable catch'releasably engaging said latch to hold'the movablemember in inoperative position, a spring for urging said catch toreleased position, locking means to maintain said latch in 'Operatingposition, an electric circuit including the latch and the catch, and anelectromagnet in said circuit to operate when energized to operate saidlocking meansf and permit the catch to move to release the latch and itsmovable member to operate the power stop and simultaneously break thecircuit thus permitting the catch to automatically return to normal. v m

t 4. A stop mechanism comprising a power stop,

a shifting 'memberior Operating said power stop yielding means normallynrging said shifting member to Shift off the power, a latch on saidshifting member, a catch mounted on a pivot pin arranged to assist inthe support of the catch against the pull of the said shiftingmember andreleasably engage said latch to hold the shifting member in inoperativeposition, an electric circuit including the latch and the catch, anelectromagnet 'in said circuit controlling the release movement of thecatch to release the latch on closing of the circuit and thus break thecircuit, and means automatically returning said catch means to' lockingposition upon breaking of the circuit.

5. In a stop mechanism, an insulated casing, an electromagnet therein, alooking armature plate pivotally mounted adjacent said electromag-- netto be moved to unlocked position when said electromagnet is energized, arelease arm pivotally mounted at one end and locked against movementbysaid plate When said plate is in Operating position, a movable catch,means for looking said catch in Operating position when said arm islocked, and means normally urging said catch and said arm into lookingposition.

6. In a stop mechanism, an insulated casing, an electromagnet therein,an armature plate pivotally mounted adjacent said electromagnet forvertical swinging movement to released position by action of the magnet,a pivotally mounted arm locked against release movement by engagementwith said plate when said plateisin operative position, said arm havinga lock notch therein, a movable catch, lateral extensions thereonadapted to seat in said lock notch, and a spring normally urging saidcatch in a direction to seat the extensions in said lock notches andmove the movable member in inoperative position, an electric circuitincluding the latch and the catch and movable member, 'and anelectromagnet in said circuit to operate when energized to move the

